eZ\Publish\Core\Helper\TranslationHelper::getLanguages PHP Method

    private function getLanguages($forcedLanguage = null, $fallbackLanguage = null)
    {
        if ($forcedLanguage !== null) {
            $languages = array($forcedLanguage);
        } else {
            $languages = $this->configResolver->getParameter('languages');
        }
        // Always add $fallbackLanguage, even if null, as last entry so that we can fallback to
        // main/initial language if domain supports it.
        $languages[] = $fallbackLanguage;
        return $languages;
    }